Watch case

Abstract

A watch case including external and internal case bands, crystal, and flexible packing wherein provision is made of a horizontal groove for a leaf spring and vertical groove for a lever and thereby being easily assembled and disassembled by means of the lever.

What is claimed is: 
     
       1. A watch case comprising: a. an external case band having an inside wall,   b. an internal case band having an outside wall,   c. a crystal,   d. a flexible packing sandwiched between the upper surface of said internal case band and the lower surface of said crystal,   e. a horizontal groove formed on the outside wall of said internal case band,   f. a leaf spring having an internal side fitted to to said horizontal groove,   g. a vertical groove formed on the outside wall of said internal case band into which a lever is inserted, and   h. a hole provided on the inside wall of said external case band through which said leaf spring is engaged, and wherein   i. the operating point of said lever is within said vertical groove and on the internal side of said leaf spring.   
     
     
       2. A watch case as claimed in claim 10 wherein at least one end of said leaf spring is slidably mounted on said external case band by calking in press method. 
     
     
       3. A watch case as claimed in claim 1 wherein said crystal comprises a glass plate and a ring. 
     
     
       4. A watch case as claimed in claim 1 wherein an arm of said lever is arranged in said horizontal groove of said internal case band. 
     
     
       5. A watch case as claimed in claim 1 wherein a long blind hole is provided at the inside wall of said external case band for engagement with said leaf spring and a cutaway portion or hole is formed at the bottom of said long blind hole to compulsorily insert said leaf spring therein. 
     
     
       6. A watch case as claimed in claim 1 wherein a foot of said lever protrudes internally from the side wall of said internal case band when said foot is not engaged with said external case band. 
     
     
       7. A watch case as claimed in claim 1 wherein said lever is positioned internally from said side wall of said internal case band when said leaf spring is not engaged with said external case band. 
     
     
       8. A watch case as claimed in claim 1 wherein the lower surface portion of said external case band is engaged with said foot of said lever and thereby said leaf spring being compulsorily protruded at the upper portion of said lever.